now you're a real fisherman. [ male announcer ] humana. for many, nexium helps relieve heartburn symptoms caused by acid reflux disease. osteoporosis-related bone fractures and low magnesium levels have been seen with nexium. possible side effects include headache, diarrhea, and abdominal pain. other serious stomach conditions may still exist. talk to your doctor about nexium. >>> the health care sector is trading at new all-time highs. surge is being fueled by pharma and lab stocks. if you own those, nice little stat to know. >>> if you're like me, you know that health care exchanges are going to be set up all over america as part of the president's health care law. but if you're also like me, you have no idea what that means or how they will work. so let us fix that right now. joining us, ken spurling, national health exchange strategy leader at ai hue weewl. in plain non-wonky english, what are health care exchanges, how do they work, and why do we care? >> it is just a competitive marketplace wherebiers and sellers come together. we al